Input timing in DDR mode with loopback DQS sampling

[goto11]

Hello,

I have two questions about QuadSPI's Input timing in DDR mode with loopback DQS sampling.
No1
Is it a mode that can be used with serial flash without DQS?
No2
Can the QSPI_A_DQS (EPDC1_DATA04) pin be open when used in this mode?
Or does the QSPI_A_DQS (EPDC1_DATA04) pin connect to any pin?

Regards,

Goto

[Yuri · Accepted solution]

@goto11 
Hello,

   It is possible to use DDR QSPI flash without DQS, assuming
the loopback. Add 18pf on the DQS pin.

Regards,
Yuri.